required polia vo formulári a chybová hláška

<tr>
<td align="left">
</td>
<td>
<input type="hidden" name="missing_fields_redirect" value="formchyba.html">
</td>
</tr>

name="required"

function error()
{
   global $form, $natural_form, $errors;
   if (isset($form['missing_fields_redirect'])) {
      if (isset($form['redirect_values']))
         header('Location: ' . $form['missing_fields_redirect'] . '?' . getenv('QUERY_STRING') . "\r\n");
      else
         header('Location: ' . $form['missing_fields_redirect'] . "\r\n");
   } else {
      if(!isset($form['title']))
         $form['title'] = 'PHPFormMail - Error';
      $output = "<h1>The following errors were found:</h1>\n<ul>\n";
      $crit_error = 0;
      while (list(,$val) = each ($errors)) {
         list($crit,$message) = explode('|',$val);
         $output .= '  <li>' . $message . "</li>\n";
         if ($crit == 1)
            $crit_error = 1;
      }
      $output .= "</ul>\n";
      if ($crit_error == 1)
         $output .=  "<div class=\"crit\">PHPFormMail has experienced errors that must be fixed by the webmaster. Mail will NOT be sent until these issues are

resolved.  Once these issues are resolved, you will have to resubmit your form to PHPFormMail for the mail to be sent.</div><div class=\"returnlink\">Please use the <a href=\"javascript:

history.back();\">back</a> button to return to the site.</div>\n";
      else
         $output .=  "<div class=\"returnlink\">Please use the <a href=\"javascript: history.back();\">back</a> button to correct these errors.</div>\n";
      output_html($output);
   }
}

 if (isset($form['missing_fields_redirect'])) {
      if (isset($form['redirect_values'])){
       foreach ($errors as $e) {
    echo "-- $e.\n";
}
} else{
         foreach ($errors as $e) {
    echo "-- $e.\n";
}
}else{